202121002220 has 48 divisors (see below), whose sum is σ = 426960206400. Its totient is φ = 80371388160.

The previous prime is 202121002219. The next prime is 202121002231. The reversal of 202121002220 is 22200121202.

It is a junction number, because it is equal to n+sod(n) for n = 202121002195 and 202121002204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11245601 + ... + 11263559.

It is an arithmetic number, because the mean of its divisors is an integer number (8895004300).

Almost surely, 2^202121002220 is an apocalyptic number.

202121002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121002220 is an abundant number, since it is smaller than the sum of its proper divisors (224839204180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121002220 is a wasteful number, since it uses less digits than its factorization.

202121002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21258 (or 21256 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202121002220 its reverse (22200121202), we get a palindrome (224321123422).

The spelling of 202121002220 in words is "two hundred two billion, one hundred twenty-one million, two thousand, two hundred twenty".